Air quality in Singapore's central region enters unhealthy range, 24-hour PSI reading hits 103

Air quality in Singapore’s central region entered the unhealthy range on Friday (Sept 4) morning, recording a 24-hour Pollutant Standard Index (PSI) reading of 103.The unhealthy band is from 101 to 200.This is the first time since October 2023 that PSI readings entered the unhealthy range due to haze.Data from the National Environment Agency (NEA) shows readings in other regions remaining in the moderate range.The next highest readings were recorded in the western and eastern regions, at 88 and 87 respectively. At the northern and southern regions, 24-hour PSI stood at 77 and 75 Meanwhile, 1-hour PM2.5 readings are within the normal range in most regions, except at the central and eastern regions, where elevated readings of 64 and 57 were recorded at 8am.An elevated reading occurs when 1-hour PM2.5 is within the range of 56 and 150.What to doAccording to NEA's health advisory on outdoor activities during haze, members of the public should consider reducing strenuous outdoor activities for the next hour when 1-hour PM2.5 readings are in this range.